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发明名称
Electrical key
摘要
申请公布号
US2775662(A)
申请公布日期
1956.12.25
申请号
US19520318718
申请日期
1952.11.04
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HARRISON HENRY C.
分类号
H01H15/10
主分类号
H01H15/10
代理机构
代理人
主权项
地址
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